Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method, in a first Radio Base Station (RBS), for communicating radio connection establishment information using Orthogonal Frequency Division Multiplexing (OFDM) to a plurality of User Equipment (UE), the method comprising: broadcasting system information on a Broadcast Channel (BCH) using a Multicast Broadcast Single Frequency Network (MBSFN) radio transmission format to the plurality of UEs, wherein the system information is related to establishing a radio connection between the first RBS and at least one UE out of the plurality of UEs, and wherein the broadcasting is performed synchronously in time with broadcasting the same system information on BCH using MBSFN radio transmission format by at least a second RBS; receiving a radio connection establishment request from a UE of the plurality of UEs; performing measurements of the radio connection establishment request as received from the UE; sending information related to the measurements of the radio connection establishment request to the second RBS or a central controller; obtaining a set of Downlink (DL) demodulation reference signals associated with a DL control channel for the UE; transmitting, to the UE, a radio connection establishment response comprising the set of DL demodulation reference signals associated with the DL control channel.
A radio base station (RBS) communicates radio connection setup information to multiple user equipments (UEs) using OFDM. The RBS broadcasts system information on a broadcast channel (BCH) using an MBSFN radio transmission format. This system information allows UEs to establish a radio connection with the RBS. The broadcasting is synchronized with at least one other RBS also broadcasting the same system information on the BCH using the same MBSFN format. The RBS receives a radio connection establishment request from a UE, measures the characteristics of this request, and sends these measurements to a second RBS or a central controller. The RBS obtains a set of downlink (DL) demodulation reference signals for a DL control channel for the UE and transmits a radio connection establishment response to the UE. This response contains the DL demodulation reference signals which help the UE configure connection parameters.
2. The method of claim 1 , wherein the system information comprises Random Access Channel (RACH) information.
The method from the previous description, where the broadcast system information related to radio connection establishment contains Random Access Channel (RACH) information. This RACH information is part of the system information broadcasted on the BCH using MBSFN.
3. The method of claim 2 , wherein the RACH information comprises physical configuration information of the RACH.
The method, where the RACH information, which is part of system information broadcasted on the BCH using MBSFN, includes the physical configuration details of the RACH itself. The physical configuration includes parameters that allow the UE to properly access the RACH.
4. The method of claim 1 , wherein the radio connection establishment request comprises a Random Access preamble related to the system information.
The method where the radio connection establishment request from the UE includes a Random Access preamble. This preamble is specifically related to the broadcast system information and indicates the UE's intent to connect using the established RACH parameters.
5. The method of claim 1 , further comprising: receiving information related to the measurements of the radio connection establishment request from the second RBS; performing analysis of information related to the measurements of the radio connection establishment requests.
The method further includes the first RBS receiving measurement information from a second RBS, measurement data related to the radio connection establishment request initially sent by the UE. Then, the first RBS analyzes the measurement information of the radio connection establishment requests.
6. The method of claim 5 , wherein the obtaining a set of DL demodulation reference signals comprises determining the set of DL demodulation reference signals associated with the DL control channel based on analysis of the information related to the measurements of the radio connection establishment requests.
In this method, the RBS determines the set of downlink (DL) demodulation reference signals for a DL control channel based on an analysis of measurement information related to radio connection establishment requests. The analysis of the UE’s request helps choose the correct DL demodulation reference signals.
7. The method of claim 6 , wherein the determining the set of DL demodulation reference signals comprises mapping a received Random Access preamble and DL demodulation reference signals associated with a DL control channel.
The method determines the set of downlink (DL) demodulation reference signals by mapping a received Random Access preamble from the UE to a specific set of DL demodulation reference signals for a DL control channel. The preamble received from the UE during initial access is directly linked to specific DL demodulation reference signals.
8. The method of claim 6 : further comprising determining a set of physical antennas to use for the transmitting the radio connection establishment response to the UE based on analysis of the information related to the measurements of the radio connection establishment requests; wherein the transmitting the radio connection establishment response to the UE comprises transmitting, to the UE, the set of DL demodulation reference signals associated with the DL control channel using the set of physical antennas.
The method determines the set of downlink (DL) demodulation reference signals based on analysis of measurement information related to radio connection establishment requests. The RBS also determines which physical antennas to use when sending the radio connection establishment response to the UE. This decision is based on the analysis of the measurement information. The RBS then transmits the DL demodulation reference signals using the selected physical antennas.
9. The method of claim 8 : further comprising determining antenna configuration parameters for configuring the set of physical antennas based on analysis of the information related to the measurements of the radio connection establishment requests; wherein the transmitting the radio connection establishment response to the UE comprises using the determined antenna configuration parameters for transmitting, to the UE, the set of DL demodulation reference signals associated with the DL control channel using the set of physical antennas.
The method determines the set of downlink (DL) demodulation reference signals based on analysis of measurement information related to radio connection establishment requests. The RBS determines antenna configuration parameters for the physical antennas. This is also based on the measurement information analysis. When transmitting the radio connection establishment response to the UE, the RBS uses the determined antenna configuration parameters to transmit DL demodulation reference signals using the selected physical antennas.
10. The method of claim 5 : wherein the sending information related to the measurements of the radio connection establishment request comprises sending the information related to the measurements of the radio connection establishment request over an X2 interface; wherein the receiving information related to the measurements of the radio connection establishment request from the second RBS comprises receiving the information related to the measurements of the radio connection establishment request from the second RBS over an X2interface.
The method sends the measurement information about the radio connection establishment request to another RBS via an X2 interface. The first RBS receives information related to the measurements of the radio connection establishment request from the second RBS over an X2 interface.
11. The method of claim 1 , wherein the obtaining the set of DL demodulation reference signals associated with the a DL control channel comprises receiving the set of DL demodulation reference signals associated with the DL control channel from the central controller.
The method obtains the set of DL demodulation reference signals associated with a DL control channel by receiving them from a central controller. Instead of determining them locally, the RBS gets the DL demodulation reference signals directly from the central controller.
12. The method of claim 11 : further comprising receiving a set of physical antennas to use for the transmitting the radio connection establishment response to the UE; wherein the transmitting the radio connection establishment response to the UE comprises transmitting the set of DL demodulation reference signals associated with the DL control channel to the UE using the set of physical antennas.
In addition to receiving the DL demodulation reference signals from a central controller, the RBS also receives a set of physical antennas to use for transmitting the radio connection establishment response to the UE. The RBS transmits the DL demodulation reference signals using the specified physical antennas.
13. The method of claim 12 : further comprising receiving antenna configuration parameters for configuring the set of physical antennas; wherein the transmitting the radio connection establishment response to the UE comprises using the received antenna configuration parameters for transmitting, to the UE, the set of DL demodulation reference signals associated with the DL control channel using the set of physical antennas.
The method receives DL demodulation reference signals and physical antennas from the central controller. The RBS also receives antenna configuration parameters. The RBS then uses these antenna configuration parameters when transmitting the DL demodulation reference signals using the provided physical antennas to the UE.
14. The method of claim 1 , wherein the broadcasting system information comprises broadcasting system information using the BCH allocated in dedicated MBSFN sub-frames.
The method broadcasts system information on a BCH using an MBSFN radio transmission format. This broadcasting uses BCH resources allocated specifically in dedicated MBSFN sub-frames. The system information broadcast is scheduled within specific subframes allocated to MBSFN.
15. A method, in a User Equipment (UE), for configuring the US based on radio connection establishment information received using Orthogonal Frequency Division Multiplexing (OFDM) from a plurality of Radio Base Stations (RBS), the method comprising: receiving broadcast system information on a Broadcast Channel (BCH) in dedicated sub-frames from the plurality of RBSs; transmitting a radio connection establishment request to multiple RBSs based on the received system information; receiving a radio connection establishment response from a first RBS, the radio connection establishment response comprising a set of Downlink (DL) demodulation reference signals associated with a DL control channel; configuring the UE by demodulating the DL control channel using the set of DL demodulation reference signals associated with the DL control channel.
A user equipment (UE) configures itself based on radio connection establishment information it receives from multiple radio base stations (RBSs) using OFDM. The UE receives broadcast system information on a Broadcast Channel (BCH) in dedicated sub-frames from the RBSs. Based on this information, the UE transmits a radio connection establishment request to multiple RBSs. The UE receives a radio connection establishment response from an RBS. This response includes a set of downlink (DL) demodulation reference signals. Finally, the UE configures itself by demodulating the DL control channel using the received DL demodulation reference signals which are associated with the DL control channel.
16. The method of claim 15 , wherein the system information comprises Random Access Channel (RACH) information.
The method of a UE configuring itself based on radio connection establishment information, where the received system information, broadcasted on a Broadcast Channel in dedicated subframes from the multiple RBSs, includes Random Access Channel (RACH) information.
17. The method of claim 16 , wherein the system information comprises physical configuration information of the RACH.
The method of a UE configuring itself based on radio connection establishment information, where the system information, that includes Random Access Channel (RACH) information (broadcasted on a Broadcast Channel in dedicated subframes from the multiple RBSs), further includes the physical configuration of the RACH.
18. The method of claim 15 , where the radio connection establishment request comprises a Random Access preamble.
The method of a UE configuring itself based on radio connection establishment information, where the transmitted radio connection establishment request includes a Random Access preamble.
19. The method of claim 15 , further comprising adapting the UE to the demodulated DL control channel.
The method of a UE configuring itself based on radio connection establishment information includes the step of adapting the UE to the demodulated DL control channel. After successfully demodulating the DL control channel, the UE further adjusts its internal parameters to properly communicate with the network through the established control channel.
20. A Radio Base Station (RBS) for communicating radio connection establishment information with a plurality of mobile User Equipment (UE), the RBS comprising: a transceiver configured to: broadcast system information related to establishing a radio connection on a Broadcast Channel (BCH) using a Multicast Broadcast Single Frequency Network (MBSFN) radio transmission format to the plurality UEs; receive a radio connection establishment request from a first UE; a scheduler connected to the transceiver and configured to schedule the transceiver to broadcast the system information synchronously in time with at least another RBS broadcasting the same system information on the BCH using MBSFN radio transmission format; a processor connected to the scheduler and to the transceiver, the processor configured to perform measurements of the radio connection establishment request received from the first UE; wherein the transceiver is further configured to send information related to the measurements of the radio connection establishment request to the another RBS or a central controller; wherein the processor is further configured to obtain a set of Downlink (DL) demodulation reference signals associated with a DL control channel for the first UE based on the measurements of the radio connection establishment requests; wherein the transceiver is further configured to transmit the set of DL demodulation reference signals associated with the DL control channel to the first UE in a Random Access response.
A radio base station (RBS) communicates radio connection establishment information with multiple user equipments (UEs). The RBS includes a transceiver to broadcast system information on a Broadcast Channel (BCH) using an MBSFN radio transmission format, and to receive a radio connection establishment request from a UE. A scheduler ensures the system information is broadcast synchronously with other RBSs. A processor measures the radio connection establishment request and the transceiver sends this information to another RBS or a central controller. The processor obtains a set of downlink (DL) demodulation reference signals and the transceiver transmits these signals to the UE in a Random Access response.
21. A User Equipment (UE) for receiving radio connection establishment information using Orthogonal Frequency Division Multiplexing (OFDM) from a plurality of Radio Base Stations (RBS), the UE comprising: a transceiver configured to: receive broadcast system information on a Broadcast Channel (BCH) in dedicated sub-frames from the plurality of RBSs, transmit a radio connection establishment request to multiple of RBSs based on the received broadcast system information; receive a radio connection establishment response from a first RBS, wherein the radio connection establishment response comprises a set of Downlink (DL) demodulation reference signals associated with a DL control channel; a processor connected to the transceiver and configured to cause the UE to use the set of DL demodulation reference signals for demodulating the DL control channel.
A user equipment (UE) receives radio connection establishment information using OFDM from multiple radio base stations (RBSs). The UE contains a transceiver to receive broadcast system information on a Broadcast Channel (BCH) in dedicated sub-frames from the RBSs, and to transmit a radio connection establishment request to multiple RBSs based on the received information. The transceiver receives a radio connection establishment response containing downlink (DL) demodulation reference signals. A processor then configures the UE to use these DL demodulation reference signals to demodulate the DL control channel.
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October 7, 2014
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